Planet marks Earth Hour: Countries around the world switch off lights for 60 minutes to call attention to climate change [Photos]

It lasted for just an hour and its power is purely symbolic. But in countries around the world, at 8:30 p.m., people switched off their lights for Earth Hour, a global call for international unity on the importance of addressing climate change. Reuters

It lasted for just an hour and its power is purely symbolic. But in countries around the world,...

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Begun in Sydney in 2007, Earth Hour has spread to more than 180 countries, with tens of millions of people joining in, from turning off their own porch lights to letting the grand sites like the Opera House go dark. Reuters

Begun in Sydney in 2007, Earth Hour has spread to more than 180 countries, with tens of millions...

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These 60 minutes are "an opportunity" to shift "the consumption culture and behavior change toward sustainability," Indian Environment Minister Harsh Vardhan said. All this happens and yet many people, of course, barely notice. Reuters

These 60 minutes are "an opportunity" to shift "the consumption culture and behavior change...

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The ancient Colosseum after the lights were switched off for Earth Hour in Rome. Reuters

The ancient Colosseum after the lights were switched off for Earth Hour in Rome. Reuters

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In Jordan, the Royal Society for the Conservation of Nature arranged 11,440 candles on a hilltop in the capital of Amman, establishing a Guinness World Record for the largest candle mosaic. Reuters

In Jordan, the Royal Society for the Conservation of Nature arranged 11,440 candles on a hilltop...